| Bridge level parameter | |
|---|---|
| default RSTP settings | set protocol rstp bridge-priority 32k set protocol rstp max-age 20 set protocol rstp hello-time 2 set protocol rstp forward-policy 15 |
| Edge port | listen to BPDU, and will switch to no-edge port if receive BPDU |
| Edge port | set protocol rstp interface ge-0/0/2.0 edge |
| port cost | |
By default, the interface link cost is determined by the link speed. to control which bridge is the designated bridge Cost based on if speed but [ 1 through 200,000,000 | set protocol rstp interface ge-0/0/13.0 cost 20,000 ( 1G port) set protocol rstp interface ge-0/0/13.0 mode point-to-point |
| link cost change will affect the local switch right away | set protocol rstp interface ge-0/0/13.0 cost 2,000 ( # 10G port) |
| port priority ( for root path cost calculation ) | |
interface priority to control which interface is elected as the root port. The interface priority must be set in increments of 16. The default value is 128. [ 0 to 240 | set protocol rstp interface ge-0/0/14.0 priority 128 set protocol rstp interface ge-0/0/14.0 mode shared |
| Root path cost , cost from the bridge to the Root Bridge | least-cost path to the root bridge |
| root path cost = sum ( root path cost received + port cost ) | to determine to root port on the switch |
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